/**
 * Copyright (c) 2018, dreamkaylee@foxmail.com All Rights Reserved.
 */

package com.common.util;

import java.net.InetAddress;
import java.net.UnknownHostException;

import javax.servlet.http.HttpServletRequest;

/**
 * Ip
 * @author limk
 * @date 2018年3月26日 下午12:00:55
 * @version
 */
public class IpUtil {
	
	private static final String UNKNOWN = "unknown";
	private static final String LOCAL = "0:0:0:0:0:0:0:1";
	private static final String LOCAL_IP = "127.0.0.1";
	
	/**
	 * 获取登录用户IP地址
	 * @param request
	 * @return
	 */
	public static String getIpAddr(HttpServletRequest request) {
		String ip = request.getHeader("x-forwarded-for");
		if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
			ip = request.getHeader("Proxy-Client-IP");
		}
		if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
			ip = request.getHeader("WL-Proxy-Client-IP");
		}
		if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
			ip = request.getRemoteAddr();
		}
		if (LOCAL.equals(ip)) {
			ip = "本地";
		}
		return ip;
	}
	
	/**
	 * 获取登录用户IP地址
	 * @param request
	 * @return
	 */
	public static String getMangMacIpAddr(HttpServletRequest request){
		int num = 15;
		String s = ",";
		String ipAddress = request.getHeader("x-forwarded-for");  
        if(ipAddress == null || ipAddress.length() == 0 || UNKNOWN.equalsIgnoreCase(ipAddress)) {  
            ipAddress = request.getHeader("Proxy-Client-IP");  
        }  
        if(ipAddress == null || ipAddress.length() == 0 || UNKNOWN.equalsIgnoreCase(ipAddress)) {  
            ipAddress = request.getHeader("WL-Proxy-Client-IP");  
        }  
        if(ipAddress == null || ipAddress.length() == 0 || UNKNOWN.equalsIgnoreCase(ipAddress)) {  
            ipAddress = request.getRemoteAddr();  
            if(LOCAL_IP.equals(ipAddress) || LOCAL.equals(ipAddress)){  
                //根据网卡取本机配置的IP  
                InetAddress inet=null;  
                try {  
                    inet = InetAddress.getLocalHost();  
                } catch (UnknownHostException e) {  
                    e.printStackTrace();  
                }  
                ipAddress= inet.getHostAddress();  
            }  
        }  
        //对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割 , //"***.***.***.***".length() = 15
        if(ipAddress!=null && ipAddress.length() > num) {   
            if(ipAddress.indexOf(s)>0){  
                ipAddress = ipAddress.substring(0, ipAddress.indexOf(s));  
            }  
        }
        return ipAddress;
	}

}
